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lego/providers/dns/iijdpf/iijdpf.go
2022-11-25 18:12:21 +01:00

144 lines
4.0 KiB
Go

// Package iijdpf implements a DNS provider for solving the DNS-01 challenge using IIJ DNS Platform Service.
package iijdpf
import (
"context"
"errors"
"fmt"
"time"
"github.com/go-acme/lego/v4/challenge"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
"github.com/miekg/dns"
dpfapi "github.com/mimuret/golang-iij-dpf/pkg/api"
dpfapiutils "github.com/mimuret/golang-iij-dpf/pkg/apiutils"
)
// Environment variables names.
const (
envNamespace = "IIJ_DPF_"
EnvAPIToken = envNamespace + "API_TOKEN"
EnvServiceCode = envNamespace + "DPM_SERVICE_CODE"
EnvAPIEndpoint = envNamespace + "API_ENDPOINT"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
Token string
ServiceCode string
Endpoint string
PropagationTimeout time.Duration
PollingInterval time.Duration
TTL int
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
Endpoint: env.GetOrDefaultString(EnvAPIEndpoint, dpfapi.DefaultEndpoint),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 660*time.Second),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 5*time.Second),
TTL: env.GetOrDefaultInt(EnvTTL, 300),
}
}
var _ challenge.Provider = &DNSProvider{}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
client dpfapi.ClientInterface
config *Config
}
// NewDNSProvider returns a DNSProvider instance configured for IIJ DNS.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvAPIToken, EnvServiceCode)
if err != nil {
return nil, fmt.Errorf("iijdpf: %w", err)
}
config := NewDefaultConfig()
config.Token = values[EnvAPIToken]
config.ServiceCode = values[EnvServiceCode]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig takes a given config
// and returns a custom configured DNSProvider instance.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config.Token == "" {
return nil, errors.New("iijdpf: API token missing")
}
if config.ServiceCode == "" {
return nil, errors.New("iijdpf: Servicecode missing")
}
return &DNSProvider{
client: dpfapi.NewClient(config.Token, config.Endpoint, nil),
config: config,
}, nil
}
// Timeout returns the timeout and interval to use when checking for DNS propagation.
// Adjusting here to cope with spikes in propagation times.
func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
return d.config.PropagationTimeout, d.config.PollingInterval
}
// Present creates a TXT record using the specified parameters.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
ctx := context.Background()
fqdn, value := dns01.GetRecord(domain, keyAuth)
zoneID, err := dpfapiutils.GetZoneIdFromServiceCode(ctx, d.client, d.config.ServiceCode)
if err != nil {
return fmt.Errorf("iijdpf: failed to get zone id: %w", err)
}
err = d.addTxtRecord(ctx, zoneID, dns.CanonicalName(fqdn), `"`+value+`"`)
if err != nil {
return fmt.Errorf("iijdpf: %w", err)
}
err = d.commit(ctx, zoneID)
if err != nil {
return fmt.Errorf("iijdpf: %w", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
ctx := context.Background()
fqdn, value := dns01.GetRecord(domain, keyAuth)
zoneID, err := dpfapiutils.GetZoneIdFromServiceCode(ctx, d.client, d.config.ServiceCode)
if err != nil {
return fmt.Errorf("iijdpf: failed to get zone id: %w", err)
}
err = d.deleteTxtRecord(ctx, zoneID, dns.CanonicalName(fqdn), `"`+value+`"`)
if err != nil {
return fmt.Errorf("iijdpf: %w", err)
}
err = d.commit(ctx, zoneID)
if err != nil {
return fmt.Errorf("iijdpf: %w", err)
}
return nil
}